Avoid a double-free in an error path.

Signed-off-by: Kurt Roeckx <kurt@roeckx.be>
Reviewed-by: Matt Caswell <matt@openssl.org>
(cherry picked from commit 1549a265209d449b6aefd2b49d7d39f7fbe0689b)

diff --git a/crypto/dh/dh_ameth.c b/crypto/dh/dh_ameth.c
index 0ba4d4476b0c78c6b4d0f91cc95952ee7f617bb4..76df91b4e2a1634ffd4a478976635eb0d551cc5b 100644 (file)
--- a/crypto/dh/dh_ameth.c
+++ b/crypto/dh/dh_ameth.c
@@ -258,6 +258,7 @@ static int dh_priv_encode(PKCS8_PRIV_KEY_INFO *p8, const EVP_PKEY *pkey)
     dplen = i2d_ASN1_INTEGER(prkey, &dp);
 
     ASN1_INTEGER_free(prkey);
+    prkey = NULL;
 
     if (!PKCS8_pkey_set0(p8, OBJ_nid2obj(NID_dhKeyAgreement), 0,
                          V_ASN1_SEQUENCE, params, dp, dplen))